Le Grand Bornand · France
La Noire des Pylônes
Black (advanced)
56
Excellent
558 m
Length
235 m
Vertical drop
1776 m
Starts at
1541 m
Ends at
40.9%
Avg gradient
84.3%
Max gradient
sustained 50 m
Elevation profile
Run analysis
La Noire des Pylônes is a black (advanced) run at Le Grand Bornand measuring 558 m, dropping 235 m from 1776 m down to 1541 m. It averages a 40.9% gradient, steepening to around 84.3% at its most sustained pitch.
Snowboard-friendly: no significant flat or uphill sections detected along the descent.
Bonvo Slope Score: 56/100 — Excellent
Vertical8/30
Length3/25
Gradient character25/25
Flow20/20
Scored from the run's real geometry — steepness is judged against what a black (advanced) run should feel like, so every difficulty class can reach 100. Methodology
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